MESON Chess Problem Database

Problem Display
PID: 84873 (8/2QB3r/2NR3p/2p4K/1N6/1Pk5/P1P1pRpb/2B1n1q1 w - - 0 1)

Petite, Efren

Arguelles JT, 1963

8/2QB3r/2NR3p/2p4K/1N6/1Pk5/P1P1pRpb/2B1n1q1

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc2
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sf3
      • 2.Rd3#
    • 1...cxb4
      • 2.Sd4#
      • 2.Sa5#
      • 2.Se5#
      • 2.Sa7#
      • 2.Se7#
      • 2.Sb8#
      • 2.Sd8#
  • Tries
    • 1.Rxe2?
      • threat
        • 2.Sd5#
      • 1...Sxc2
        • 2.Rxc2#
        • 2.Rd3#
      • 1...cxb4
        • 2.Sd4#
      • 1...Qd4!
    • 1.Rf3+?
      • 1...Sd3
        • 2.Rfxd3#
        • 2.Rdxd3#
      • 1...Sxf3
        • 2.Rd3#
      • 1...Qe3!
    • 1.Rd2?
      • threat
        • 2.Sd5#
      • 1...cxb4
        • 2.Se5#
      • 1...Rxd7!
    • 1.Rd4?
      • threat
        • 2.Rc4#
      • 1...c4
        • 2.Rxc4#
      • 1...cxd4!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Sd5#
      • 1...cxb4
        • 2.Se7#
      • 1...Sd3
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,XP(C)::R1(I)
    • S(a);N_GUARD::R1(I),XS(a)
    • S(a);N_GUARD::R1(I)
  • Tries
    • Try
      • R(D);XP(c)
      • Threat
        • S(F)
      • Vars
        • P(g);SBLOCK,XS(F)::QAR(J)+S(H)
      • Refutation
        • Q(b);
    • Try
      • R(D);CHECK
      • Vars
        • S(a);N_GUARD,XR(D)::R1(I)
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • R(I);
      • Threat
        • S(F)
      • Vars
        • P(g);SBLOCK,XS(F)::QAR(J)+S(H)
      • Refutation
        • R(i);XB(K)
    • Try
      • R(I);
      • Threat
        • R1(I)
      • Vars
        • P(g);::R1(I),XP(g)
      • Refutation
        • P(g);XR(I)
  • Actual
    • B(K);
    • Threat
      • S(F)
    • Vars
      • P(g);SBLOCK,XS(F)::QAR(J)+S(H)
      • S(a);N_GUARD::R1(I),XS(a)
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